~=

~=
Prev	10.16. Raster Operators	Next

Name

~= — Returns TRUE if A's bounding box is the same as B's.

Synopsis

boolean ~=( raster A , raster B );

Descrizione

The ~= operator returns TRUE if the bounding box of raster A is the same as the bounding box of raster B.


	This operand will make use of any indexes that may be available on the rasters.

Disponibilità: 2.0.0

Esempi

Very useful usecase is for taking two sets of single band rasters that are of the same chunk but represent different themes and creating a multi-band raster

SELECT ST_AddBand(prec.rast, alt.rast) As new_rast
    FROM prec INNER JOIN alt ON (prec.rast ~= alt.rast);

Si veda anche

ST_AddBand, =